680 PEOEESSOE OWEN ON THE MAESUPIAL POUCHES, MAMMAEY GLANDS, 
of error had to be considered. But I know of no pentadactyle ecaudate marsupial 
animal which could have afforded a mammary or marsupial foetus with the characters of 
that which Mr. Harris affirms to have discovered attached to the female Echidna, and 
which he transmits to his correspondents in Melbourne as the young of that monotreme. 
The condition of the mammary glands, and the presence of heretofore unobserved mar- 
supia, accord moreover with her alleged maternity and with the state of development of 
her offspring. 
It occurred to me that an additional test might be afforded by the more essential parts 
of the female organs of generation. These had been examined in a general way by 
Drs. Mueller and Rudall, whose “ Notes ” have been already quoted. I proceeded, 
therefore, to remove these organs (Plate XLI. fig. 1), with the rectum (ib. m), urinary 
bladder (r), urogenital canal (u), and cloacal vestibule (ml). 
The left ovarium (o), as in the Ornithorliynchus paradoxus , is of an oblong flattened 
form, developed from the posterior division of the ovarian ligament ( i ) and corre- 
sponding wall of the ovarian capsule (c ) ; it consists of a rather lax stroma invested by 
a smooth, thin, firm “tunica propria,” which glistens where stretched over the enlarged 
ovisacs. Of these there were five, of a spherical form, most of them suspended to the 
rest of the ovarium by a contracted part of the periphery, not stretched into a pedicle. 
The largest had a diameter of 1^ line, the least of the five had a diameter of rather 
less than one line. In the recent state, very fine vessels were spread reticularly, according 
to the original dissectors, over the ovisacs. Beneath these, or nearer the ovarian liga- 
ment, was a cluster of smaller ovisacs, the largest not exceeding ^rd of a line, the rest 
so small as to give a granular character to the part. External to this, at the end of 
the ovarium nearest the bifurcation of the ligament, was an empty ovisac (g% 2f lines 
in length, and 2 lines in diameter, of a flattened pyriform shape, with a somewhat 
wrinkled exterior, attached by the base, with the apex slightly tumid, and showing a 
trace of a fine cicatrix. This is a “corpus luteum” or ovisac from which an ovarian 
ovum had been discharged. 
The oviducal branch of the ovarian ligament passes, as in the Ornithorliynchus , to the 
outer angle of the wide oviducal slit or aperture (e), which occupies or forms the margin 
of the ovarian pouch ( c ), opposite to that to which the ovary is attached. The ligament 
spreads upon the inner wall of the infundibular part of the oviduct, and rejoins the 
ovarian division of the ligament, to be continued along the oviduct, puckering up its 
short Convolutions into a small compass. 
The “ fallopian” aperture of the infundibulum (e), is a longitudinal slit of 9 lines in 
length, with a delicate membranous border extending about a line beyond the part 
where the muscular and mucous tissues of the oviduct make the thin wall of the infun- 
dibulum opake ; its transparency against a dark ground, contrasting with the opake 
beginning of the proper tunics of the oviduct, which nevertheless are here very thin. 
No part of this delicate free margin is produced into fimbriae ; in this respect the 
